Ignore the smug comment from Lucylou. You could argue that 11 lb is far too little and unless overweight to start with is well below 'healthy' recommendations.
I gained about 2.5 stone with my first, on the same track for this one but found it fell off very quickly. Lots of water weight.
If you manage to breastfeed that burns the calories and think helped me shift it.
Try not to worry about it, I know a few people that put on similar weights and most had shifted it with 6 months to a year.
This helps you see what some of the weight is for:
At birth, a baby weighs about 3.3kg (7.3lb).
The placenta, which keeps your baby nourished, weighs 0.7kg (1.5lb).
The amniotic fluid, which supports and cushions your baby, weighs 0.8kg (1.8lb).
The other two thirds of extra weight is due to the changes that happen to your body while you’re pregnant. On average:
The muscle layer of your womb (uterus) grows dramatically, and weighs an extra 0.9kg (2lb).
Your blood volume increases, and weighs an extra 1.2kg (2.6lb).
You have extra fluid in your body, weighing about 1.2kg (2.6lb).
Your breasts weigh an extra 0.4kg (0.9lb).
You store fat, about 4kg (8.8lb), to give you energy for <a class="break-all" href="https://www.babycentre.co.uk/a613/breastfeeding-for-beginners" rel="nofollow" target="_blank">breastfeeding</a>.